X-Nico

Fiat justitia ruat caelum

The falling sky clause occurs in the passage of Terence, suggesting that it was a common saying in his time, "Quid si redeo ad illos qui aiunt, ‘Quid si nunc cœlum ruat?’" — "What if I have recourse to those who say, ‘What now if the sky were to fall?’".

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In De Ira (On Anger), Book I, Chapter XVIII, Seneca tells of Gnaeus Calpurnius Piso, a Roman governor and lawmaker, when he was angry, ordering the execution of a soldier who had returned from a leave of absence without his comrade, on the ground that if the man did not produce his companion, he had presumably killed the latter.

see also